3. TROUBLE SHOOTING
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3.13.4 Main MIC Trouble Shooting
A Main MIC is located at the bottom of PCB
It operates in case of voice call (handset), voice recording, camcorder recording
START
Check the Mic signal by test mode
or Voice recording.
End
3. Check parts about Mic Output
(FB6920) works well ?
2. Check parts about Mic Bias(1.77V)
(VA6923) works well ?
Change Main Board
1. Check Mic-
hole and mesh and Mic- Rubber
Voice Signal OK?
No
No
No
Yes
Yes
Yes
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